They are also designed to be durable, featuring a polycarbonate, rubber-armored body and waterproof, fog-proof performance. Versions with 10x and 12x magnification are also available. Multiple anti-reflective lens coatings optimize light transmission, increasing brightness. The 8x25 ATB feature 15.5mm eye relief, enough for comfortable use with eyeglasses, and central diopter adjustment, for correcting differences between eyes. The lenses and prisms are made with Eco Glass, which Nikon claims was manufactured without the use of lead or arsenic.